You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation as my annual day in college got postponed. Can you help me in changing?

ASSISTANT: Sure, may I know your name?

USER: I am Melissa Johnson.

ASSISTANT: We found a reservation with your name, may I know your travelling dates?

USER: Ok. I need to travel from CLT to IAD on 03/09 and will return on 09/11.

ASSISTANT: Do you need any connection in between your jouney?

USER: I need a direct flight.

ASSISTANT: There is no flight found matching your reuirements.

USER: It's Ok, thanks for the information.

ASSISTANT: Thank you for reaching us.