You are a flight assistant. 
 USER: Hi, I am Gary Lewis.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please assist me in booking a flight ticket to SEA from DFW?

ASSISTANT: Sure, on which dates would you like me to book a flight ticket for you?

USER: My travel dates are from Jun 13 to Jun 15.

ASSISTANT: Are you comfortable with single connection?

USER: Yes, I am comfortable with connecting flight.

ASSISTANT: In which class would you prefer to travel?

USER: I want to travel in business class.

ASSISTANT: Ok, please wait I will get back to you.

USER: Ok.

ASSISTANT: We found a business class ticket in JetBlue airline with price 900, are you comfortable to travel?

USER: No, I can afford upto 500 only.

ASSISTANT: Sorry, no flights were available under price 500.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.