You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I provide assistance to you?

USER: As I am sports person, I need to attend in a tournaments. But due to some technical issues it was postponed.

ASSISTANT: Ok.

USER: Would you help me in changing the reservation with the name of John Davis?

ASSISTANT: Sure, I am perky to serve you.

USER: Ok.

ASSISTANT: Please wait for a while, I will check the reservation with your name.

USER: Sure.

ASSISTANT: I am here to say that, there is no previous reservation available with your name.

USER: No problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.