You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: As my tournament got postponed, can you help me to change my existing reservation?

ASSISTANT: I will help you with that. Please wait for a while, I will get back to you.

USER: Ok.

ASSISTANT: I am sorry to say that there is no reservation found. May I know your name please?

USER: Please check on the name of Alexander Jones.

ASSISTANT: Thank you for contacting us.

USER: That's ok, thank you.