You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Turner.

ASSISTANT: How can I help you today?

USER: I am planning to attend music concert at IAD, can you please help me with booking a flight ticket from OAK?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, I would like to take off on Jan 23 and return on Jan 25.

ASSISTANT: Do you have any airline preference?

USER: No, but I would like to depart during morning time.

ASSISTANT: Ok, can you please mention your class preference?

USER: I am ok with any class.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry for inconvenience, there were no flights running at that location due to abnormal weather conditions.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.