You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Clark.

ASSISTANT: How can I help you today?

USER: I am planning to travel on these days that is on Dec 17 and return on Dec 19. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your travelling airport codes?

USER: Sure, my airport codes are from IAH to LAS.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: I found a flight with JetBlue airline having 1 connection and airfare is 300. Can I proceed to booking?

USER: Yes, you can proceed with the booking.

ASSISTANT: Your ticket is booked in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.