You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name?

USER: Myself Stephen Mitchell, please help me in making some changes in existing reservation, due to my busy schedule on my previously planned dates.

ASSISTANT: Sure, Stephen. Give me few seconds to check the status of your reservation.

USER: Sure, you can take your time, I will be on line.

ASSISTANT: I think you have not done your reservation properly, there is no reservation found on your name.

USER: Ok, I will check with it again, thank you for your information.

ASSISTANT: Fine, thank you for reaching us.

USER: You are welcome.