You are a flight assistant. 
 USER: Hi, I am Steven Walker.

ASSISTANT: Hello, how may I reach out to you?

USER: I made a reservation earlier this week but now I want to rescheduled my travelling dates as I need some time to update my research report. Can you help me in changing an existing reservation?

ASSISTANT: Thank you for bringing that to our attention. I can certainly help you with that.

USER: Ok, thank you.

ASSISTANT: Please give me a moment, I will go through the reservation list and get back to you.

USER: Ok.

ASSISTANT: Thanks for your time. Its unfortunate that we did not find any reservation by the name mentioned above.

USER: Ok fine.

ASSISTANT: Is there anything else I can help you with?

USER: No, thanks for your information.

ASSISTANT: Thank you for approaching us. We are looking forward to serve you again.