You are a flight assistant. 
 USER: Hi. I am Elizabeth Brown.

ASSISTANT: Hello, how may I help you?

USER: I would like to go for a round trip with my family. So, can you help me in booking a direct fight in my journey?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your journey dates please?

USER: My journey dates are from 02/28 to 03/01.

ASSISTANT: Ok, could you please share your airport codes?

USER: My airport code is Houston, TX - HOU.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thanks for your time, sorry no flights found with your details.

USER: Not an issue. Thank you for quick response.

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