You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you today?

USER: I am Susan Rodriguez here. I am planning to meet my friend in Houston, HOU. Can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, I will aid you with that. Can you please mention your preferable travel dates?

USER: My preferable travel dates are Mar 04 and Mar 06.

ASSISTANT: Are you okay with connecting flight or you need any direct flight?

USER: I need a connecting flight in my journey.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: I arrival time is afternoon.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for contacting us.