You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What help you are expecting from our travel agency?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Yes, I will definitely help you in changing the ticket reservation details. Shall I know your full name please?

USER: Sure, My name is Rebecca Thompson.

ASSISTANT: Ok, please let me check the ticket status. Please be on  hold for a while.

USER: Sure.

ASSISTANT: I am really sorry to inform you that, I haven't found any reservation with your name to change the details.

USER: Ok, no issues. Thank you.

ASSISTANT: It's my pleasure. Thank you for contacting us.