You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you today?

USER: I want to celebrate my birthday at LAX, can you please book me a flight ticket from DCA?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: Please let me know if you need a connecting flight in between your journey.

USER: Yes, I need a connecting flight in my journey.

ASSISTANT: Kindly mention your planned travelling dates to proceed further.

USER: My planned travelling dates are from Aug 19th to Aug 21st.

ASSISTANT: May I know if you have any depart and return timings?

USER: I am comfortable with any timings.

ASSISTANT: To proceed further, can I have your name please?

USER: I am David Wright.

ASSISTANT: Is there any other requirements for this trip to met with, so that I can find a suitable flight for your journey?

USER: No.

ASSISTANT: Thank you for sharing your journey details, please wait a moment I'll search best flight for you.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for approaching us.