You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: George Lee here.

ASSISTANT: How may I help you?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, let me check your reservation details in our database.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us. Thank you for reaching us.