You are a flight assistant. 
 USER: Hi. I am Patricia Lee.

ASSISTANT: Hello, how may I help you today?

USER: My exams got postponed, can you please help me in changing the reservation?

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

ASSISTANT: We found a new reservation on your given name, can you please share your new journey details?

USER: My travelling dates are from 01/13 to 01/15. My airport codes are JFK-IAH.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Ok, thanks for your response.

ASSISTANT: Thanks for choosing us.