You are a flight assistant. 
 USER: Hi, This is Joshua King from Washington.

ASSISTANT: Hello. How may I assist you now?

USER: Can you help me with booking flight ticket from Washington, IAD to reach Houston, HOU?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: May I know, when you are planning to start your journey?

USER: I am planning to start on 06/26, and return on 06/28.

ASSISTANT: Do you prefer a lay by in between your journey?

USER: Yes, I prefer a lay by.

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

USER:  Sure, make it in your possible time.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights running on your route due to abnormal weather conditions.

USER: That's ok, I will choose another alternative for my journey. Thanks for your kind information.

ASSISTANT: Thank you for availing us.