You are a flight assistant. 
 USER: Hello, I am Amanda Harris.

ASSISTANT: Hello, how may I serve you today?

USER: As I am not issued with the leave on my journey dates so I want to change my reservation, can you help me with it?

ASSISTANT: Sure, please wait for sometime.

USER: Ok.

ASSISTANT: Thanks for being wait. There is a reservation found with your name. May I know your updated airport codes?

USER: Ok, I would like to travel from BOS to SFO.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Please provide your travelling dates.

USER: I want to travel from 07/21 to 07/23.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation found with your specifications.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for contacting us and have a good day.