You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you?

USER: Meeting family friend on his birthday got postponed, will you help me to change my existing reservation?

ASSISTANT: Sure, may I know your name to check the current status and revert you?

USER: Helen Jones here.

ASSISTANT: We found a reservation on your name. May I know your updated travel dates?

USER: My new airport codes are JFK - DTW. My travelling dates are 05/10 and 05/12.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.