You are a flight assistant. 
 USER: Hi, I am Rebecca Baker.

ASSISTANT: Hello. How can I help you Mr. Rebecca Baker.

USER: Actually we are planning for a trip to Dallas, could you book a flight ticket?

ASSISTANT: Sure, please provide me your valuable details?

USER: Sure, I would like to travel from SEA to DFW on the dates of 06/19 and might be returning on 06/21.

ASSISTANT: Mr.Rebecca Baker, I am sorry I cannot find any flight on your request. Thank you, have a nice day.

USER: It's ok, no problem. Thank you for providing your information.