You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a direct flight for my journey, can you please find out a flight for me?

ASSISTANT: Sure, let me know the airport codes?

USER: Thank you for taking my request into consideration. I want to travel from PHX to HOU.

ASSISTANT: Can you share your planned travel dates?

USER: Sure, my departure is on Aug 17 and please book my return ticket on Aug 19.

ASSISTANT: Is there any thing else I could help you with?

USER: I want to go in a normal cost airline.

ASSISTANT: Ok, may I know your name to proceed further?

USER: Sure, my name is Emma Walker.

ASSISTANT: Sorry, no flights found with your requirements.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.