You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I want to update my trip dates as my conference in Houston got postponed. Can you help me in changing the reservation made by name Donald Scott.

ASSISTANT: Sure, please wait a moment I will check the status and get back to you.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: It's Ok. Thanks for your time.

ASSISTANT: Thanks for reaching us, have a good day.