You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Janet Martinez.

ASSISTANT: How may I help you?

USER: I have planned a trip to attend a client meeting but suddenly the trip got postponed, can you please help me in flight ticket changing?

ASSISTANT: Yes, I will help you in change of flight ticket reservation.

USER: Thank you for accepting my request.

ASSISTANT: Please wait for a moment, let me check and get back to you.

USER: Sure, I can wait for your response.

ASSISTANT: Thanks for your time.

USER: It's alright.

ASSISTANT: I am sorry to inform you that there is no flight reservation on your name to change it.

USER: No issues with that one, I think it is not properly booked while I was booking. Thank you for your search and providing the information. Welcome.

ASSISTANT: Thank you for contacting us.