You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Carol Taylor.

ASSISTANT: How can I aid you today?

USER: Please book a my ticket from Chicago to Boston.

ASSISTANT: Sure, I'm happy to help you in that. Can you please help me with your source and destination airport codes?

USER: My source and destination codes are from ORD to BOS.

ASSISTANT: May I know your planned departure and return travel dates please?

USER: My journey dates are from July 20 to July 22.

ASSISTANT: Ok, may I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: Do you need halt in between your journey??

USER: Yes, I need a halt in my journey.

ASSISTANT: Ok, may I know how much can you afford for your ticket?

USER: I am looking for the flight with low cost.

ASSISTANT: Sorry to inform you that there are no flights available for you with low-cost on those dates.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for choosing us, have a great day.