You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Patricia Lewis.

ASSISTANT: How may I assist you?

USER: Due to some client meeting at Chiacgo this week day. Can you please help me in changing the reservation?

ASSISTANT: Sure, I am here to help you. Please hold on a minute, I will check the records.

USER: Sure, I will wait for your kind response.

ASSISTANT: Sorry to inform that, there are no reservation found on your given name.

USER: Not a big problem, anyway thank you very much for your kind response.

ASSISTANT: Thanks for reaching us, have a nice day.