You are a flight assistant. 
 USER: Hi, I am David Wilson.

ASSISTANT: Hello, how may I help you today?

USER: I want to go to under ground tunnel tour at Houston, TX - HOU. Can you help me to book a connecting flight?

ASSISTANT: Sure, please share me your planned journey dates?

USER: I want to fly on 12/06 and recur on 12/08.

ASSISTANT: May I know your source airport codes?

USER: My source is from Philadelphia, PA - PHL.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I found a connecting flight of airline Frontier, flight number is 1017 and fare is 100. Shall I proceed with booking?

USER: Please make it confirm.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us.