You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua King.

ASSISTANT: How can I aid you today, King?

USER: I had planned to go on a vacation with my friends, but it was postponed due to some budget problems. Can you change my recent reservation?

ASSISTANT: Sure, I am happy to help you with that. Wait for a moment, I will get back with your details.

USER: Sure, take your time.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for contacting us.