You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Here Patricia Walker.

ASSISTANT: Patricia Walker, how may I aid you?

USER: I have to change my recent flight ticket booking due to postponement of cricket match, can you please help me in changing my previous ticket?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Sure.

ASSISTANT: Sorry, no reservation is available by your name.

USER: No issues with that one, thank you for your information.

ASSISTANT: Thank you for reaching us.