You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you now?

USER: Could you please help me to update my travelling dates in my existing reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know on which name the reservation was made?

USER: I made a reservation by this name Edward Mitchell.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Not a big issue, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for reaching us.

USER: You're welcome.