You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Myself Debra Phillips. I need to change my reservation which I have done to meet my college friend but unfortunately he shifted to another location. Will you please help me with changing the reservation?

ASSISTANT: Sure, I will help you out on this concern, please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation showing on your name.

USER: Oh! May be I am wrong. Thank you for your valuable time.

ASSISTANT: Is there any other concern left with you?You are free to share with us.

USER: No, nothing. Anyway, thank you for your help.

ASSISTANT: Ok, thank you for your reaching us.

USER: Most welcome.