You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: My name is Rachel Carter. I want to book a flight ticket with in the range of 500.Can you help me with booking on 10/27?

ASSISTANT: Sure. May I know where are you heading to?

USER: I want to travel to BOS to attend seminar from IAH.

ASSISTANT: Ok. When would you like to return?

USER: I will be return on 10/29.

ASSISTANT: Is there any price limit?

USER: I need single connection.

ASSISTANT: Thank you for the information. There are no flights available at this moment.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for approaching us.