You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me to modify the trip dates in the past ticket? Because the meeting which is held in Seattle was postponed for now.

ASSISTANT: Sure, may I know your name?

USER: Thanks a lot. My name is Catherine Adams.

ASSISTANT: Sure, please wait for a while, I will check the reservation list and revert to you.

USER: Ok, I can wait for your reply. Take your time and provide me the information about my ticket.

ASSISTANT: Sorry, no reservation found on your name in my records.

USER: That's very sad to hear from your agency. Anyways thank you for your service.

ASSISTANT: Thank you for reaching us.