You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Shirley Carter here.

ASSISTANT: How can I aid you today?

USER: As my planned trip has been postponed to some other dates, I want to change my trip dates. Will you please help me with that?

ASSISTANT: Sure, I am here to help you with that. Please wait for a moment.

USER: Sure, I'll wait for your response.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name in our database.

USER: Oh! May be I did a wrong booking. Thank you anyways.

ASSISTANT: Thank you for choosing us.