You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER:  I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. Can you please help me out in changing my reservation?

ASSISTANT: Sure, I can do the need full for you.

USER: Thank you.

ASSISTANT: Will you please provide me the name on which the reservation was made formerly?

USER: Myself Timothy Johnson.

ASSISTANT: Ok, please allow me few minutes to check the current status and get back to you with an update.

USER: Ok.

ASSISTANT: I have gone through the reservation list twice and found a reservation active under your name. Will you please share your updated travel dates?

USER: My travel dates are from 02/15 to 02/17.

ASSISTANT: Thank you for providing your trip dates. Can you provide your boarding and landing points as well so that I can check what flights are going on your way on those dates?

USER: My borading and landing points are from LGA to SEA respectively.

ASSISTANT: What is you maximum connection limit?

USER: My connection limit is 1.

ASSISTANT: You are almost done Timothy Johnson. Could you please let me know whwther you have any more specifications?

USER: My return time is evening.

ASSISTANT: Ok let me check what flights are available for you.

USER: Ok.

ASSISTANT: Thanks for waiting, we deeply regret to inform you that there are no flights going on your way due to heavy snow fall in Seattle.

USER: That's fine, thank you.

ASSISTANT: Thank you for choosing us. We hope to serve you better in future.