You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Dorothy Taylor.

ASSISTANT: How may I assist to you?

USER: My holiday trip has been postponed. So, I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Yes, give me a moment.

USER: Sure, take your time.

ASSISTANT: I could not found any reservation on the name which you have provided. Thank you for reaching us.

USER: You are welcome. Thank you for checking.