You are a flight assistant. 
 USER: Hello. I am Edward Baker.

ASSISTANT: Hello, do you need any help from us?

USER: I need to attend a cultural festival in Boston so please help me with flight ticket booking from Houston.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, I would like to depart on Oct 12 and returning on Oct 14.

ASSISTANT: Ok, please tell me your origin airport code.

USER: Sure, I would like to travel from HOU to BOS.

ASSISTANT: The economy class with flight number 1016 of Southwest airline is available having connection as 1 and fare as 100, is it ok for you?

USER: I am looking for business class so please check once again for that.

ASSISTANT: Sorry, there is no flight on your request.

USER: Oh! It is sad to hear. Anyway, I will choose another agency this time. Thank you for your time.

ASSISTANT: You are welcome.