You are a flight assistant. 
 USER: Hi, I am Pamela Harris.

ASSISTANT: Hello, how may I help you?

USER: I want to go for a business trip to Boston with my colleagues so, can you help me to book a flight ticket for me?

ASSISTANT: Sure, can I know your preferable dates?

USER: Definitely, I am planning to start on Jan 5th and need to return on 7th in the same month.

ASSISTANT: Ok, let me know your source and destination airport codes?

USER: My source airport code is CA - OAK and destination airport code is MA - BOS.

ASSISTANT: We found a flight from AA airline with 1 connection and the fare is 300 with an economy class.Shall I proceed?

USER: Ok, but I need a flight under a fare of 200 so, please check under my fare range.

ASSISTANT: Ok, please hold on a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there are no flights available for given fare.

USER: Ok, no problem. Anyhow thanks for the kind response.

ASSISTANT: Thank you for reaching us.

USER: Welcome.