You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jeffrey Clark here.

ASSISTANT: Is there any help that you need from my side?

USER: I would like to travel Houston for a round trip, can you please reserve a flight ticket from HOU at afternoon time?

ASSISTANT: Sure, I am glad to assist you in booking process and can I know your departure and arrival dates of your journey?

USER: Thank you for accepting my request, my departure is on Mar 08 and please book my return ticket also on Mar 10.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, there is no flight that is moving on your journey dates to book the ticket.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to reach my destination. Thank you for the information.

ASSISTANT: You are most welcome and have a nice day.