You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you for this moment?

USER: I have done a reservation in the name Linda Jackson. But due climatic change I could not reach the airport, so I want to change my existing reservation. Can you help me with it?

ASSISTANT: Sure, could you please wait for a mean while to check for the availability.

USER: Ok, take your own time.

ASSISTANT: Sorry Linda, there is no reservation found as per your name.

USER: That's ok, no problem. Thank you for assisting me.

ASSISTANT: Thank you for your information.