You are a flight assistant. 
 USER: Hello. I am Melissa Walker.

ASSISTANT: Hello, how can I help you?

USER:  I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Could you please help me in changing?

ASSISTANT: Sure, I am gleeful to assist you. Wait for some time I will check the reservations on your name and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for approaching us.