You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: I want to change my existing reservation due to some technical issues, can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please, to check the reservation list?

USER: I am Mary Parker.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your valuable time, there is no reservation found in your name.

USER: Ok, no worries at all.

ASSISTANT: Thanks for your kind approach.

USER: Thank you for helping me.