You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Alexander Lewis here.

ASSISTANT: Nice to meet you.

USER: I am looking for a flight from HOU to DFW, can you help me?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My travelling dates are 06 and 08 of Oct.

ASSISTANT: May I know your class preference please?

USER: No.

ASSISTANT: Do you have any time concerns?

USER: My return time should be in the morning.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that there are no flights available for you on those dates with your given details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.