You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Melissa Edwards. I want to book a ticket from HOU to LAX to attend seminar, can you help me in booking?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am departing on Oct 10 and return on Oct 12.

ASSISTANT: Do you have any airline preferences?

USER: I am ok with any airlines.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: That's ok, thank you for your information.

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