You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of service you are looking from us?

USER: I have booked a ticket with wrong dates, can you help me in changing my reservation?

ASSISTANT: Sure, you are at right place. I will help you with changing your reservation. For checking your reservation status, may I know your name?

USER: Myself David Parker.

ASSISTANT: Parker, please be online for a moment. I will check your reservation status and get back to you.

USER: Sure, I will wait for your response.

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

USER: No problem, thanks for checking.

ASSISTANT: You are most welcome and thank you for contacting us.