You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a ticket from SFO to IAH.

ASSISTANT: May I know your travel dates?

USER: Depart is by Feb, 6 and return date is Feb, 8.

ASSISTANT: Do you prefer connecting flight?

USER: I prefer direct flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the morning.

ASSISTANT: May I know your good name?

USER: I am Angela Lopez.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your trip dates.

USER: Thanks.

ASSISTANT: Thank you for choosing us.