You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you help me change my existing reservation which was made on the name of Matthew Baker?

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: I found your reservation could you tell me airport codes.

USER: My airport codes are SFO and HOU.

ASSISTANT: Let me know your dates as well.

USER: They are planned on 09/20 and 09/22.

ASSISTANT: I found a flight from Frontier airlines with 1 connection and flight number is 1006. Shall I proceed?

USER: Yes please.

ASSISTANT: Your ticket is booked. Thank you for reaching us.