You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me to book a flight from SFO to HOU?

ASSISTANT: Sure, I am here to help you. Please provide your travelling dates.

USER: I want to depart on Aug 1 and need to return on Aug 3.

ASSISTANT: Do you need any connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other specifications?

USER: I prefer normal-cost airline to travel.

ASSISTANT: May I know your name?

USER: Elizabeth Robinson here.

ASSISTANT: There are no flights available on your routes.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.