You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: This is Andrew Adams. Could you please help me to book a flight ticket?

ASSISTANT: Sure Adams, would you please provide the city names?

USER: My origin airport code is CA-SFO and destination code is TX-IAH.

ASSISTANT: Ok, can you mention your travel dates?

USER: I have planned from 02/19 to 02/21.

ASSISTANT: Ok, please wait a moment.

USER: I need single connection flight with the price limit of 1000. Could you please check for it?

ASSISTANT: Yes, there is a flight 1007 in airline Frontier that matches your requirements and price is 100. Shall I proceed with your booking?

USER: OK, then please confirm it.

ASSISTANT: Sure, your booking is done. Have a great journey!.

USER: Thank you.