You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Shirley Hall.

ASSISTANT: Hall, how may I guide you?

USER: I am looking for a direct flight for my journey from LGA to HOU, can you please help me with booking my flight ticket?

ASSISTANT: Sure Hall, I am here to help you with that. When would you like to travel?

USER: Sure, I will depart on 08/16 and return on 08/18.

ASSISTANT: Just a moment.

USER: Sure.

ASSISTANT: As per your data, sorry for inconvenience. No flight is available.

USER: No problem, thank you for the information.

ASSISTANT: You are most welcome.