You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Baker.

ASSISTANT: How may I render you today?

USER: Due to my health problem I want to change my reservation, can you please help me that?

ASSISTANT: Sure, please wait for few minutes, I will check with your recent reservation status.

USER: Ok.

ASSISTANT: There is no existing reservation found on your good name.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you so much.