You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I need to change my existing reservation some weather problems, Can you please help me with that?

ASSISTANT: Ok, there is possibility to amend your reservation. Can you provide me the name on which the ticket is been reserved to check?

USER: Shirley Taylor here.

ASSISTANT: Thank you for waiting, sorry as per the reservation records I did not find our reservation to change.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Ok, thank you for choosing our agency.