You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Nancy Jackson.

ASSISTANT: How may I guide you today?

USER: I am planning to take my parents to The Space Needle in SEA, can you please help me to book a flight from HOU?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable departure and return dates of travelling?

USER: I will start on Apr 2nd and will return on Apr 4th.

ASSISTANT: Do you have any class preference?

USER: No, I don't have any class preference.

ASSISTANT: Do you have any airline preference?

USER: I am fine with any airlines.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Please make sure, I want to depart in the afternoon.

ASSISTANT: We regret to inform you, there are no flights moving to your region with your planned dates of travelling.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us, hope you have a great day.