You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: This is Nicholas Miller, can you help me to book a flight ticket from IAH to IAD?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My preferable journey dates are Jan 10 and Jan 12.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in the evening.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Please share me your connection limit.

USER: I prefer connecting flight.

ASSISTANT: Please wait for a moment.

USER: Sure, please ensue that I prefer normal cost airline.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.