You are a flight assistant. 
 USER: Hi, I am Melissa Hall.

ASSISTANT: Hello. How can I help you?

USER: I need to visit LBJ presidential library in Austin AUS with my teacher. Can you make a reservation with fare 1000?

ASSISTANT: Sure, may I know when you want to travel?

USER: Sure, I would like to fly on 01/28 and 01/30.

ASSISTANT: Ok, do you need any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Please help me with your source code.

USER: Sure, I need to deviate from DFW.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to inform we didn't find any flights with your details.

USER: Ok, not an issue. Thank you for your assistance.

ASSISTANT: Thank you for reaching us, have a nice day.