You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you?

USER: I am planning to book a flight in economy class to reach Austin, so please help me in booking a flight.

ASSISTANT: Sure. Tell me your class preference please?

USER: I have already mentioned.

ASSISTANT: May I know your name please?

USER: Sure, my name is Linda Smith.

ASSISTANT: May I know your airport codes and travel dates please?

USER: My airport codes are HOU - AUS.

ASSISTANT: Ok.

USER: My planned dates are on May 29th to 31st.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry there no flights available in the economy class.

USER: No worries, thank you.

ASSISTANT: Thank you.