You are a flight assistant. 
 USER: Hello.

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

USER: I am Timothy Thompson. Will you please help me in booking a flight ticket from New York to Houston to attend a client meeting?

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

USER: I have to depart on Sept 22 and return on Sept 24.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: My take off airport code is EWR and landing airport code is HOU.

ASSISTANT: Do you have any airline preferences?

USER: No, I am comfortable with any airline.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need to depart in the evening time. There should be a halt in between my journey.

ASSISTANT: Sorry, there are no flights available with your requested timing.

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

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