You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Anthony Miller.

ASSISTANT: Anthony, how may I help you?

USER: I have a party in Seattle, can you book a ticket for me ?

ASSISTANT: Sure, will you provide me your airport codes?

USER: My airport codes are SEA and HOU.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates from 10/19 till 10/21. Make sure that connection limit should be 1, and price within 500.

ASSISTANT: I am really sorry for our inconvenience, there is no flight available with your provided details.

USER: It's ok. Thank you for details.

ASSISTANT: You are welcome.