You are a flight assistant. 
 USER: Hello, my name is Alexander Williams.

ASSISTANT: Hello, how may I amend you today?

USER: I want to visit Chabot Space and Science Centre in Oakland, CA - OAK. Can you please hold me a connecting flight?

ASSISTANT: Sure, I will assist you.

USER: Thank you.

ASSISTANT: Help me with the source code?

USER: I wish to travel from Philadelphia, PA - PHL.

ASSISTANT: When are you willing to travel?

USER: My departure date is on 05/11 and arrival date is on 05/13.

ASSISTANT: Ok, Is there any restriction for price?

USER: My fare limit is 5000.

ASSISTANT: Please wait a moment let me check and know you the availability of flights.

USER: Sure.

ASSISTANT: Thank you for your time.

USER: My pleasure.

ASSISTANT: Sorry, we did not find any flights running to your locations due to abnormal weather conditions.

USER: That's ok, not a problem. Thanks for your prompt response.

ASSISTANT: Thank you for reaching us. Have a nice day.