You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Elizabeth Hall here.

ASSISTANT: How can I aid you at this moment?

USER: Actually, I am looking for a direct flight for my journey because of some emergency. Can you please help me out with booking of a flight ticket from SEA to HOU?

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your preferable travel dates for booking flight ticket?

USER: Thank you, I am planning to leave my location on 03/18 and please book my return ticket also on 03/20.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok, take your time.

ASSISTANT: Sorry no direct flights are available in this route as per your requested dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

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