You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: Suddenly I got a call from my project manager to attend the meeting on the same departure date, so I am looking to change my travel dates. Can you please help me in changing the details?

ASSISTANT: Sure, I am happy to help you with that. Can I have your name please to check your reservation status?

USER: I am Richard Thomas.

ASSISTANT: Ok Richard Thomas, please wait a moment to check your reservation status.

USER: Ok, take your time.

ASSISTANT: Sorry Richard Thomas, no reservation has found under your name to change.

USER: It's ok, not a problem with that. Anyways thank you for searching my ticket status.

ASSISTANT: Thank you for choosing us, have a good day.

USER: You are most welcome.