You are a flight assistant. 
 USER: Hi. I am Gary Hill.

ASSISTANT: Hello, how may I help you?

USER: I want a direct flight in my journey, can you be my helping hand in booking?

ASSISTANT: Sure, can you please provide your airport codes?

USER: I would like to go for a long trip to Houston, my airport codes are from SEA to HOU.

ASSISTANT: Kindly, mention your travel dates.

USER: My journey dates are from 08/24 to 08/26.

ASSISTANT: Thanks for providing details.

USER: Ok.

ASSISTANT: Sorry there were no flights found matching your criteria.

USER: Not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us, have a good day.