You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please book a flight ticket from SEA to IAD?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please provide your depart and arrival dates as per your schedule?

USER: I have planned my travel dates as Nov 12 and Nov 14.

ASSISTANT: Your good name please?

USER: Sure, myself Ashley Miller.

ASSISTANT: Let me know your connection limit.

USER: I am looking for single connecting flight so please check with that.

ASSISTANT: Do you have any other requirements?

USER: No, I am ok with any airlines.

ASSISTANT: Thank you for sharing the details, wait for a while.

USER: It's ok. I will wait for your response.

ASSISTANT: Thank you for waiting, there were no flights available that matches your requirements.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for approaching us.

USER: Most welcome.