You are a flight assistant. 
 USER: Hi. I am Karen Smith.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to visit sky view observatory in Seattle, SEA. Can you help me to book a flight from Houston, IAH?

ASSISTANT: Sure, on what dates are you planning to make your trip?

USER: I want to travel on Nov 11 and 13.

ASSISTANT: Please let me know your class preference.

USER: I am comfortable with any class.

ASSISTANT: At what time would you like to depart and return?

USER: I want to depart in the evening time.

ASSISTANT: How many connections do you need?

USER: I need a single connection.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is a Spirit airline with flight number 1021 going on your way in the evening and the airfare is 300. Is that fine?

USER: Please proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for your response.

ASSISTANT: Thank you for choosing us.