You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Ruth Martin.

ASSISTANT: How may I help you today?

USER: I need a direct flight from Charlotte to Seattle, please help me in booking a ticket.

ASSISTANT: Sure, can I have your preferred travel dates please?

USER: Sure, my preferred journey dates are 11/19 and 11/21.

ASSISTANT: Please let me know your travel airport codes to book a ticket.

USER: My airport codes are CLT and SEA.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: There are no flight with 0 connection limit.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.